You discovered that your partner had seeked our an old gf where they worked to see if they still fancied them.
I saw an email to a friend where he had said this as they both knew his ex from years ago. It said...I went into where she worked just to see if I still fancied her at 60...
I feel a bit sick that a) he knows where she works and b) that he wanted to see her.
Obviously I can't mention that I have seen this as it was in a private folder in his emails - the laptop was left open at emails, yes I snooped so I am prepared to be ridiculed for that but I have my reasons.
I feel a bit sick tbh...